Technically, that cover would cost 2500 HP to upgrade in the character levels screen, so it could be argued that it is worth more than any other prize they regularly offer. Except that character is pretty lowly regarded and hardly ever seems to be used.
Does anyone actually have a maxed 4* Wolverine? I wonder what his stats would be, he definitely seems like someone I would skip just from tile damage alone.
Wolverine (X-Force) (from IceIX with no guarantee)
X-Force - Green
Stregth of Strike Tiles: 15 per Tile
Enraged Slash - Red
Damage: 2313 (Skill Level 4)
Recovery - Yellow
Heal: 2159 plus 154 per Yellow AP (Skill Level 4)
4626 plus 154 per Yellow AP (Skill Level 5)
Colour Damage: 55/62/10/70/9/9
Hit Points: 9328
Not too scary, when you consider that a maxed out IM40 has comparable tile damage stats and packs a bigger punch on some of his specials. IM40 lacks that healing obviously.