I take this with a grain of salt but it sounds very interesting and, as a Marx Brothers fan, I am very curious as to how this will turn out. It can go either way.
Casting and chemestry would be key in something like this. I also think that you can't do this with stars. That would just take the audience right out of the film.
To be honest, a project like this really has a low probability of success. There are just too many problems of imitating the style of the Marx Bros. and getting people to belive in it. I believe that good comedy is hard to do, especially when you are trying to do an ensemble that is supposed to be guys who have been working years at it, when in reality they aren't. I wish them luck.