I suppose it could save the MCU, if it convinced the powers-that-be to lighten up and have fun.
But that probably won't happen.
I saw it on Saturday. Very funny and enjoyable movie. Any of the usual criticisms are really not applicable to a film that is made so whimsically. It's the kind of film you just sit back and enjoy. I'm wondering if a fourth film will be green-lit, and if Reynolds will want to make one. The first film had a story and structure, but they get less coherent over time. The nature of the franchise makes this less of an issue, but I wonder if Reynolds will want to make the same movie over and over.
But I'll watch it a few more times, at least.