Prediction: He will end up in the NFL again and will do very well. I really do think he could be our future QB. Is it likely to happen? No. I've watched Manziel play for the entirety of his college career though and when he wants something, he is a fierce competitor. TBH this whole narrative that has been cooked up around him with him getting himself better. I think it makes him a better player because he wants to prove people wrong.

So he goes to Canada and has two great seasons. Then he's on the open market at age 27, is still barely 6 foot, and is still not an NFL-style quarterback. Still not marketable.
And this is all contingent on him staying clean and out of clubs.

The lasting memory of his NFL career will be him walking across the stage rubbing his fingers together doing the money sign

Even if he is successful in the CFL, I don't see him getting back to the NFL. The game in the CFL is very different (rules greatly favor the offense), but more importantly, the level of competition he will play against in Canada is not even close to what he would see in the NFL. The number of success stories in this category is very small and I don't see Manziel anywhere close to being exceptional. Good luck to him though....his presence will definitely help the CFL get exposure south of the border.