Not 100% sure (could be trolls) obviously but this is what i found in the files (spoliers)

http://gyazo.com/062...09a148a853c5eea - soma prime

http://gyazo.com/f6e...053b34f2deb18f9 - nova prime

http://gyazo.com/388...3a179b8130557b2 - vasto prime

http://gyazo.com/222...b360ebfce2be391 - holiday sigil (xmas)

http://gyazo.com/c0c...3f27d57a2fbde43 - clan sigil

http://gyazo.com/828...404f7bb7073860b - prime sigil

http://gyazo.com/593...4c464cf56cd66b8 - New frame (you might say it might not be the frame)

http://gyazo.com/3e5...a5551361f972c70 - Same setup for ember

http://gyazo.com/924...b5bb5e1732a51fb - Same setup for Limbo also

http://cloud-4.steampowered.com/ugc/544135968607792188/615F75EEF59807B12F7B52C595BF3FA152B332B8/ balistica wraith?

void sabotage for u15 https://forums.warframe.com/index.php?/topic/327945-gate-crash-design-and-overview/?p=3703558#entry3703558

http://i.imgur.com/gdQv8y2.jpg yeah

Defense rework + new hacking game http://imgur.com/a/9BJAq#3pnIksJ

WARFRAME PLAYER SHIP TEASER COUNTDOWN

https://warframe.com/theliset/

Next Prime Teaser
https://www.youtube.com/watch?v=WLn7Cr0Fjl0

check out my credit bug lol.. http://v1.steam.hlxgame.cc/sharedfiles/filedetails/?id=251520915

Warframe Solar Rails Tutorials Video
https://www.youtube.com/watch?v=HIK7RulwT9o&feature=youtu.be