ellis will start. it will depend on spencer's overall development when the season starts how/ when he gets his snaps, but nobody could stop both ware and ellis last year. how many times did we see them racing and meeting at the quarterback?
fresher legs does means better pass rush, especially on third downs and in the second half when we got the other team down and playing catch up. so, ellis needs to get over it; i predict that he will play fewer snaps but get to rush the qb just as much. also, more versatility means more packages and movements, adding more to the defense in the second year.
do you seriously think that phillips isn't salivating over getting spencer, ware AND ellis in there on critical pass rushing downs? sending 4? why not ellis, spencer, ware and ratliff/canty/tank/hatcher...you get my point. or sending canty, ellis, spencer and ratliff/tank/hatcher with ware blitzing from the linebacker spot? better be third and real short if you wanna get that ball out for a first down. oh yeah, and with corners like a healthy newman and henry, pac, mike jenkins, maybe ball or scandrick if pac don't work out, good f***in luck. 
(...and go Patrick Watkins. if he gets PT, he will have a breakout year. he is the reason JJ won't even think about breaking the bank on Hamlin just yet. this is the year to let him prove what a major steal he was in that draft...imho)