One of our students used intelliJ last year for developing our robot code, the rest of the team used eclipse.
As long as you can execute ant scripts in the right order as part of the build process, you shouldn't have any problem. That's all the official plugins do. You can steal the underlying scripts and have your intelliJ project run them in the correct order to achieve the same Build/Deploy capabilities.
I can't provide step by step instructions, but if you're interested in getting it working, I would suggest installing eclipse (instructions
here) and the 2015 plugins (when they are released).
This is the process we followed the past two seasons to get the plugins distributed for netbeans working in eclipse.
If you want to see what we had to do specifically to go from netbeans to eclipse, its all outlined in detail
here.
The process should be similar for intelliJ.