I think man-ape should be the villain for the first movie but how would you portray the character you can't have him wear his suit.(ofcourse keep a pants) I should let him wear no suit but let him transform turning his hair white and pupils white making him also a lot bigger. (giving him maybe a flat ape-like nose, ape-like fangs and ape-like claws) His origin is also pretty hard to portray I think everything in the marvel cinamatic universe is science even the magic in thor is science so I would say a long time ago a portal of an other dimension opened in Wakanda and there came creatures of the other dimension out the portal white gorilla's (that have a certain energie) and also the heart-shaped herb. What do you think of my idea is it good or completely ridiculous.
What villains do you want and how would they be portrayed?

I think klaw could maybe be better for the sequel

Doom, i know its kind of not the best for a first outing but i would love to see Wakanda vs Latveria.

Man Ape or Klaw, or Erik Killmonger

Storm

Klaw

Since Klaw was responsible for T'Challa becoming the Black Panther, it would only make sense that he is the main villain of the film... 
 

" klaw for the original, killmonger for the sequel and doom for the third. "

Klaw makes sense as the villain if its an origin movie I dont know if Man Ape could hold a whole movie as sole villain

" klaw for the original, killmonger for the sequel and doom for the third. "

I am going to echo the sentiments of everyone else with his most iconic villain Klaw.

The Masters of Evil - Klaw, Man Ape, and Red Ghost (as the obscure villain scientist). Hint of Dr Doom as well.

" The Masters of Evil - Klaw, Man Ape, and Red Ghost (as the obscure villain scientist). Hint of Dr Doom as well. "