After looking at the resized screenshot here: http://collider.com/star-wars-7-trailer-analysis-starkiller-base/ , I am pretty certain that the rumours are true and Han dies.

That shot with Daisy Ridley crying? Definitely him laying on the ground. His jacket shoulder rim stitch, shape and colour match, and above all - look at the hair. It's gray, longer and more sparse. Definitely not John Boayega and most certainly not Chewie.

Sadly, I think that this adventure will be the end for Han Solo. :(