I've been getting a kick out of the
Crisis on Infinite Earths crossover on the CW. My favorite part so far occurred in the last installment. SPOILERS FOLLOW...
I loved that the solution to the problem of The Flash's destined sacrificed was resolved by having John Wesley Shipp's 90's era Flash taking the place of Grant Gustin's Flash at the last moment. It recreated a key moment from the Crisis story, while finally giving closure to the 90's series that was abruptly cancelled. I can't wait to see what's in store for the last two chapters.