The thing I'm most hooked on is the budget and the script. The budget and the script for me is the most importent thing to begin with. The two famous actors is just the icing on the cake for me..
Danny Trejo would be really good, I cant imagin who else it would be in terms of famous (American) actors. Famous Asian actors, I actualy don know that many.
To name some of the big guns!
Jackie Chan (out of the question, to expensive).
Jet Li (out of the question, to expensive).
Donnie Yen (out of the question, to expensive).
Tony Jaa (perhabs).
I'm 99% possitive that it wont be any of the above that I mentioned. But there is always that last 1 % that makes you dream a little dream..

What name is that ???
Personally I dont expect any co star names that I know. I'm just looking forward to see what they can do with the script and the budget.