There is not alot of coverage yet of the Diamond Select booth which is unfortunate but i managed to find get image below from their facebook page. It looks like they will be coming out with a repainted Miles Morales spiderman which is the same sculpt just different paint. The Sam Wilson as captain america is totally new though and he looks pretty cool.
I managed to find a Youtube video of somebody going through the diamond select booth (which was too fast they should of went slowly) and there is some new things i saw. The Marvel pieces start at .056 of the video but showing up is Psylock, Doctor Strange (which looks amazing), Captain America, and then a Captain America premier resin statue to accompany Iron Man that i provided a picture of above. Hopefully there is more information in detail and ill post it here. Below is a link to the Youtube video so you can see it all for yourselves.
https://www.youtube.com/watch?v=4yi1V0NOnKk&t=208s