No, this is not an April Fool’s joke.
In a March 31 interview with Access Hollywood, Jim Carrey revealed that he was likely retiring from acting after Sonic 2. When asked what his plans were after Sonic 2, Carrey said “Well, I’m retiring. Yeah, probably. I’m being fairly serious. It depends, if the angels bring some sort of script that’s written in gold ink that says to me that it’s going to be really important for people to see, I might continue down the road, but I’m taking a break.”
So while Carrey does not rule out an eventual return to acting, it appears he’s ready to step away unless a really good script comes his way. He went on to elaborate on his decision, “I really like my quiet life, and I really like putting paint on canvas, and I really love my spiritual life, and I feel like – and this is something you might never hear another celebrity say as long as time exists – I have enough. I’ve done enough. I am enough.”
You can find his answer starting at 4:20 in the interview:
Among other things, this does put his future in the Sonic movie franchise up in the air. Does this mean he won’t be back for Sonic 3? Will he be recast? Or will this end up meaning nothing and he’ll be back for further Sonic movie entries? Will Robotnik as a whole be written out?
It should be noted that, historically, Carrey rarely did sequels, making Sonic 2 something of an anomaly in his career. Whatever the case, Sonic 3 is coming in two years, so we’ll know the answer soon enough.