Era-Specific Personality: He's mostly modern Supes, but we've had cameos from the Golden Age version (still The Cape, but obsessively fond of Batman) and Fifties Superman (something of a dick, to Captain America's confusion).
Broken Ace: In his own words, he's both an awe-inspiring crimefighter and one of the richest men in the world, yet he has absolutely nothing and can't imagine any future that doesn't involve him being alone.
Decoy Protagonist: In Zero Hour. With the speed and precision with which he takes control of the situation involving Lance's head, you could be mistaken for believing he's The Hero this time around. Turns out, he's a Supporting Leader.
The Lancer & The Smart Guy: To the point where Clark panics when he disappears in After Hours, and everyone panics when Lance randomly teleports him in Happy Hour.
OOC Is Serious Business: In "After Hours", Bruce is the first to revert to his World's Finest incarnation, going from grim to mild-mannered and kind mid-sentence. Superman and Spiderman are incredibly confused.
Only Sane Man: He is one of the few people that can put up with the antics of Deadpool.
Team Dad: While Clark treats everyone as an equal part of the team, Batman rescues first and lectures later, particularly Spiderman (who is the youngest).
Warrior Poet: Waxes philosophical on the ethics of not revealing Spiderman's former marriage because it was Spiderman's choice as a Heroic Sacrifice to forget about it.
Warrior Therapist: Despite not being mentally sound himself (or possibly because of it), he tends to act as one.
While defusing a bomb strapped to the Green Goblin's crotch, Bruce attempts to give relationship advice and talk Gobby down from suicidal despair.
After Tony breaks into Wayne Manor to drown his sorrows after losing to The Dark Knight (in both senses), Bruce helps Tony regain confidence with a training montage set to Eye of the Tiger. Though Bruce is still angry when Tony destroys things.
No Fourth Wall: ...Although, it's gradually progressing into this. Everyone already knows they're fictional characters with movies being made about them, but he's the only one aware that he's an action figure in a web series, and comments on the editing, his yellow subtitles and the wait between episodes.
Nice Guy: Natch. Where Rorschach tries to deal with Deadpool's perpetual chattiness by shooting him, Cap gives Deadpool a cellphone with no one on the other end. The best part is that Cap's solution actually works.
Cap is remarkable in that he's the only character to date that hasn't taken criticisms against his movies personally and does his best to be impartial. When it came time for his movie to be squared off with Green Lantern's, the other Avengers were the ones who violently responded to the latter's criticisms on their leader's behalf. Cap was not impressed.
The trend continues with The Dark Knight Rises vs. The Avengers. Every Avenger lashes out at Batman except Captain America, who's trying to (unsuccessfully) calm everyone down.
Ret Gone: What he hoped to do to the Marvel Universe in After Hours.
The Smart Guy: His future self is this to the Green Goblin and Deadpool in Zero Hour.
Lance M. Donovan
An Original Character introduced in After Hours. He's revealed as Lex Luthor's spy early on. Is a douche. As it turns out, he's a demi-android created through S.H.I.E.L.D. and Cadmus technology; designed to be so realistic that nobody could suspect him of being mechanical. Most of the plots revolve around him in some way.Dude.
Flat Character: His personality consists almost entirely of saying "Dude" and "Dude. Sucks" to passers-by. Invoked by Lex Luthor, as Lance was designed to be the last person anyone would ever want to talk to or suspect of anything intelligent.
Meaningful Name: As the Nick Furys eventually realise, Lance M. Donovan is a Life Model Decoy, a type of android from the Marvel Universe but enhanced with Project Cadmus technology from the DC Universe.
Abusive Parents: His relationship with the (as-yet-unseen) Harry consists of them shouting insults at each other from different rooms. The sad thing is that this is a step up from some continuities. Here, it's Played for Laughs.
Fine, it's your room! In fact we'll make it your own country! We'll call it Harrystan! Main import: Daddy's money! Main export: DISAPPOINTMENT!
Norman: Oh, you mean the son I wish I had? TELL HIM TO COME OVER!
Alternate Character Interpretation: Invoked as it turns out Gobby's differences from his comic book self are actually a plot point. Darkseid considers him a Wild Card because of it; fearing that he may be the only one who can ruin his plans.
Body Horror: Aside from the scars, of course: After Polachi!Joker uses Apokoliptian technology on Doom to transform him (along with Venom, Sabretooth, Two-Face and Mr. Freeze) into one of the horrific monsters seen in the future timeline. He gets better, though.
Enemy Mine: He gives Batman the handlink that ultimately leads to Luthor's defeat.
Evil Plan: His is to reveal to the heroes of the multiverse that their existence is meaningless, and their lives can be entirely changed on the whim of the executives if they so desire. Thus, they would lose all will to fight—this is, in Darkseid's eyes, the true Anti-Life Equation.