So I do see the biggest flaw of the show. Wentworth Miller usually owns every scene he is in. But so do Brandon Routh, and Victor Garber. And Arthur Darvill is not a slouch. There are Nine main characters. I suspect if they do a Constantine lead season 2 as rumored, the cast will be a bit smaller next time.
Hopefully, it won't hurt too badly for this year.
Other notes:
The preview trailer with Barry and Ollie doesn't actually take place. In fact no Barry at all.
Waverider! Per Degaton!
Gideon. With a new voice actress. Morena must have been filming Deadpool at the time. I'll have to check next week, and see if they have changed her for Thawne also.
The previews show they alter the past at some point, and Stein's wedding ring vanishes. A poosibility for a potential crossover this spring. They change the past, and suddenly there are aliens on Earth, and an agency hunting them. With the assistance of an alien. And, her cousin in Metropolis suddenly being a thing on Arrow and Flash. (As opposed to Barry meeting Kara via dimensional travel.)