Batman: Arkham Asylum GoTY and Batman: Arkham City GoTY

Heya.

Currently Humble Bundle is selling these two games for $4.99 each. I know Asylum has only been cheapest by $0.50 in the past and this is the cheapest City has been, but as someone who is less-than-moderate about DC and casually watches Batman media (All the Batman movies, Batman Beyond and the 90's Batman cartoon) is this worth the $10? Will these two maybe get cheaper soon? I do love Assassin's Creed and Shadow of Mordor type gameplay, so if it's anything like that, aside from story, I'd love.

Thanks!