- Ben having nightmares about Malware in the past have taken a bit of a toll on him when Guardians starts, likely remembering Feedback.
- The flashback for Feedback's initial destruction was devestating for everyone involved; Ben was traumatised, Gwen and Max could only hold him to comfort him and Azmuth could only watch from afar after Malware's supposed demise.
- Ben and Skurd later find a recording of when Azmuth removes the Omnitrix from his 11 year old self
- Billy's backstory is treated a lot more tragically, especially with his parent's deaths at the hands of Computron.
- Rook's family lost a member because of a rogue plumber; Da's brother, Rook Fra. A bit of a Heartwarming moment occurs when Ben makes a statue.
- Carl Tennyson getting injured by Captain Nemesis with Ben watching in horror.
- It's revealed in Ben 23's earth that Grandpa Max died when he was rather young
Tear Jerker / Ben 10: Guardians