Teddy Sears IS Jay Garrick

it'll depend on how they used him they should keep the effect of what the rime wraith did to him cause it'll make him more messing and more a creepy thing that keep haunting Barry and the others of / star labs team/ team flash.




From: http://dc.wikia.com/wiki/Black_Flash_(New_Earth)
that'll keep it fresh .

but if they reverse that that, that'll be an issue of sorts and might be as you said.


Besides we do know barry in the book's and the others of team flash fought a black flash that came back to give them trouble in book that looks like what the time wraiths did to zoom in the books.

 

I for one will be glad to see Teddy back Zoom was a far superior villian than Savitar!