The true harbinger of Fantomex's inevitable doom is the fact that Gambit is getting a solo series this Fall.
I don't think thats fair to sya. A good writer would know how to make similair characters co-exist with one another and individually benefit from it. Look at what Morrison did with three teleoaths on one team and two ferals. Or K-Y's X-Force which had feral/ blade weilding types all over the place.
I think they could develop a health frenemy or bromance if feature in the same title. I know I want to see them cross paths in Gambit's solo at some point, it would be incredible.