I'm sure I read somewhere that they were planning on going back to 6 PPV a year and I think that's the best way, I've always thought Slamiversary should be treated as there showcase but Bound For. Glory gets that honour. Lockdown should just stay as a special Impact in my opinion or be dropped all together same with Destination X.
6 PPV Names I would have:
Victory Road
No Surrender
Against All Odds
Bound For Glory
Slamiversary
Sacrifice