The only zoom I don't think I'll ever give up is my 70-200 f2.8 IS MKII. It's that good and it's that versatile. The 135L is a fantastic lens. I just never warmed up to it at weddings. I must have owned that thing like 5 times and every single time I end up selling it. 
85 1.8 is a solid lens. It's obviously not the 85L, but honestly, you aren't losing all that much and you save so much money.
I must say I can't imagine shooting a wedding without my 50L. If 35mm is wide enough for you, then that's OK. I prefer to have something wider available.
All this is a matter of style and preference.
Please though...let's NOT get into the whole "creativity" with primes vs zoom. That's been done to death and then some.

