You also have to remember that the budgets for Ant Man and even Origins: Wolverine didn't START at 150 million. They were amped up to 130/150 for other reasons. Like Edgar Wright leaving Ant Man and them needing to hire another direction after a lot of the pre-production was done, or all those action re-shoots added to Origins: Wolverine. Those amped up the project some, so Gambit starting with that seems even more hefty. Especially as not only is this Gambit untested, but we don't even know how he's going to connect in with the rest of the Marvel movies. Wolverine is the direct link or at least player that ties all the X-Men together, and Ant Man even before releasing was going to be in the MCU and is going to be in their next movie. Where exactly is Gambit going to appear again after this for audiences to look forward too? Also thinking about it considering the nature of Ant Man's power it makes sense why it'd take so much work getting that right and again at least Jackman was a star as Wolverine to ask a good deal for his pay. How is Gambit going to cost so much anyway? Honestly with it only having one big profile hero we know of it should be closer in terms of budget to Deadpool then Wolverine. Yes Gambit's skills will probably take some money to put on the big screen right... really 150 million dollars enough?