I've envisioned him acting that way if he -really- needs something for a job, but in all his history and backstory I don't recall it ever really being shown, or really even hinted.
However, with what they did to Iceman, and the complete backlash to just sort of shoehorn in that he was gay - it left a bad taste in a lot of people's mouths, mine included. If it was a gradual reveal, I wouldn't have minded... with hints thrown in here and there before the reveal. But it was just sort of BAM - gay. Introducing characters that way is fine too (Northstar), but I don't think if there have been any suggestions or hints that it is needed.
Especially not now, with the potential MCU/Fox merger... not a great time to rock the boat.
PLUS, seeing how well Deadpool did as a movie when they stick to the source material? Yeah, it's typically a formula for success. Do the legit thing first, -then- experiment.