History Trivia / OKKOLetsBeHeroesS2E18CrossoverNexus

** No Warner Bros. Animation productions are represented other than ''WesternAnimation/TeenTitansGo'', despite the studio producing many series specifically for the network.[[note]] However the ''[[WesternAnimation/LooneyTunes Looney Tunes]]'' franchise is given a blink-and-you'll-miss-it ShoutOut in the form of a building with the name ACME at CN City, while the original ''WesternAnimation/TeenTitans2003'' is alluded to when Raven almost goes back to that universe.[[/note]] Similarly, no Creator/HannaBarbera properties like ''Franchise/ScoobyDoo'' and ''WesternAnimation/TomAndJerry'' were included due to Warner Bros. having ownership over the characters. This was all due to the [[RightHandVsLeftHand endemic issues]] that plagued [=TimeWarner=]/Creator/WarnerMedia (which AT&T had begun trying to sort out 8 months before the episode's premiere by folding CN into Warners; any potential future crossover events will not have these issues).
** Concurrently running shows such as ''WesternAnimation/{{Ninjago}}'', ''WesternAnimation/SonicBoom'', and ''WesternAnimation/MegaManFullyCharged'' were also absent, due to being owned by the LEGO Group, SEGA, and Capcom, respectively.

** Only two CN foreign co-productions not broadcast on the U.S. channel were depicted, as detailed below.
** Outside of ''WesternAnimation/SamuraiJack'', which was a Cartoon Network Original in its first four seasons before being revived for a [[SamuraiJack/TropesSeason5 fifth and final season]] on Adult Swim (with a poster for said fifth season being the only reference to that show), no Adult Swim shows were included due to the block being treated as a separate entity from CN (as well as being family-unfriendly).

** ''WesternAnimation/{{Robotboy}}'' was considered, but as the show is owned by Gaumont and not Cartoon Network, they couldn't.

* WordOfGod: Due its status as a MassiveMultiplayerCrossover featuring various works, some of which either ended or have heavy continuity, the canonicity status for each is left vague. Upon being asked about it on Website/{{Twitter}}, Creator/ManOfActionStudios founder Duncan Rouleau responded that [[https://twitter.com/rouleau1/status/1170101588809015296?s=20 the crossover is considered canon]] to the ''Ben 10'' [[WesternAnimation/Ben102016 reboot continuity]].

** The ''WesternAnimation/TotalDrama'' franchise isn't represented, likely due to co-ownership with Creator/FreshTV, which presumably also applies to ''WesternAnimation/{{Sixteen}}'' (this one also co-owned with Creator/{{Nelvana}}), ''WesternAnimation/{{Stoked}}'', and ''WesternAnimation/GrojBand''.

** No Warner Bros. Animation productions are represented other than ''WesternAnimation/TeenTitansGo'', despite the studio producing many series specifically for the network.[[note]] However the ''[[WesternAnimation/LooneyTunes Looney Tunes]]'' franchise is given a blink-and-you'll-miss-it ShoutOut in the form of a building with the name ACME at CN City, while the original ''WesternAnimation/TeenTitans'' is alluded to when Raven almost goes back to that universe.[[/note]] Similarly, no Creator/HannaBarbera properties like ''Franchise/ScoobyDoo'' and ''WesternAnimation/TomAndJerry'' were included due to Warner Bros. having ownership over the characters. This was all due to the [[RightHandVsLeftHand endemic issues]] that plagued [=TimeWarner=]/Creator/WarnerMedia (which AT&T had begun trying to sort out 8 months before the episode's premiere by folding CN into Warners; any potential future crossover events will not have these issues).

** Black Hat (actually, according to Black Hat himself, [[ActuallyADoombot a clone]]) from ''{{WesternAnimation/Villainous}}'' makes a brief cameo as one of the "striked" heroes, making this episode the first time he's been on television in the United States.

* DoingItForTheArt:
** In order to get references for I.M. Weasel's mouth movements, Ian JQ had to access Cartoon Network's old site via the [=WayBack=] Machine because the physical copies of them were inaccessible.
** The team had to get legal requests for ''every'' cameo, which was a very long process, and they also went the effort of tracking down their model sheets so they'd match the art styles of their respective shows.

** ''WesternAnimation/{{Robotboy}} was considered, but as the show is owned by Gaumont and not Cartoon Network, they couldn't.