Yes, He is a soldier with a mouth because he is sooooo talkative . Also he has the ability of healing. Most of all he is neither a hero nor a villain that makes it very interesting. Coming to the trailer, it is designed such a way that every marvel fan will wait for that movie.
We have some talkative superheros in marvel universe like spiderman. Deadpool is mentality unstable( according to YouTube) so even a TASK MASTER can’t fight with him as no one can predict his moves.
Trailer has some good parts of movie like that why I wear red because no one can see me bleeding and tthen pointing to a guy wearing brown pants and said this one got the right idea. That was too much funny
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So it was just a trailer picture abhi baki hai!