So I was watching Shrek 4 recently because it's the best film to ring in the new decade.

At the start of Tapestry Captain Picard goes to sickbay due to sustaining unexpected injuries. It's at this point he finds himself "dead". He talks to Q (a being with godlike powers), and mentions the regrets of his youth. He took risks as a young man, ended up in a fight with some Nausicaans, and had his natural heart replaced with an artificial one. The only reason he is in this situation now is because of his past actions that he regrets.

Whereas with Shrek 4, Shrek is at a birthday party for his son. (An odd parallel here is that the actor who plays young Picard is also Patrick Stewart's son, this must be a subtle nod to the Shrek franchise.) He is strained and bored by married life. He eventually roars and runs off in a huff, having punched the birthday cake. He visits Rumpelstiltskin (a being with godlike powers) and mentions the regrets of being in the cinematic disaster Shrek the Third and wishes for it to be retconned. The only reason he is in this situation now is because of his past actions that he regrets.

So, that's the initial setup. In Star Trek, the act of changing the past is done by not fighting the Nausicaans, whereas in Shrek 4 it's achieved by signing the contract.

Either way, both end up back in the present day with the past having been changed as they desired. In both worlds neither Shrek nor Picard are well known (if they existed in the same universe, they would be brothers).

Initially, both are happy with their decisions. Picard is alive as a Junior Science Officer, and Shrek is living the carefree life as an Ogre. Both are free of significant responsibility, as Picard is no longer Captain and Shrek doesn't have a family to care for.

The revelation, brought by Q/Rumpelstiltskin is that they cannot go back. In the case of Tapestry, this is because if he goes back he will be dead. In the case of Rumpelstiltskin's deal, Rumpelstiltskin removed the day Shrek was born, and therefore he doesn't exist.

Q is more of a force for good if we look at the Star Trek side, (if it even is Q) whereas Rumpel reverted time for his own gain.

In either case, both Jean Luc and Shrek regret their decision of changing the past.

BUT, here's the kicker.