I have a feeling they will have Grodd be Season 2's primary villain, with him mind controlling Eddie for the first part for some more added drama where Barry has to try and figure out whether he can truly save Eddie.
All of the Rogues that Barry has pissed off coming for him at the end would be epic, and I wonder if that will tie into Wells' master plan (if he even has one).
IMO, Arrow season 1 was so good because of the strong emphasis on the epic flashbacks, Oliver becoming the Arrow in Starling and The List, and the fact that his archery and killing skills were over 9000. Flash is quickly becoming so good that it will probably overtake it for me, although Barry hasn't gotten as many chicks this season as Oliver did in his first season. :heenan:
Green Arrow is my all time favorite non-metahuman and Flash is in my top 5 for metahumans in the DC world soo it's a tough call for me, they'll be the best of each of their kinds for awhile.. Arrow deals more with the non-metahuman side mainly mixed with a little "technological advancements".. Flash will be the better show that deals with straight superhuman abilities. Either way I'm happy I'm in this age where these two shows are airing.