I don't think he will leave. I mean, look at Mark/London. He left and his band is not exactly roaring up the charts. I think I read an article that says he still lives at home and their band has a tour bus that always breaks down. Why would Evan give up the great gig with Avril to struggle away as an unknown??
Most likely if he wants to sing as lead and do his own songs he will have Spinfire as a side project. Sort of like how the Blink 182 guys have Boxcar Racer as their side project. Avril will have to take time off to write her new CDs and this is when Evan could work on Spinfire.
Anyway, Avril is the most important, as long as she is there that is the main thing!

Maybe Spinfire can open for her if Evan leaves.
