I got it mainly for the Starlin Warlock and Captain Marvel material Omni-sized, even though I already have the relevant Masterwork volumes. An Omni of this material has been on my wish-list for a while. Even though only 80% of the material is represented here, it will have to do; I'll place it on the shelf next to the Infinity Gauntlet Omni.
I'm such a sucker for the larger size of the Omnis I guess.
The Starlord and Rocket material is new to me and is an appealing bonus.