Wow...are there any tickets left for Adepticon? (looks like no...******!)
https://www.warhammer-community.com/2017/03/03/adepticon-the-one-thing-you-dont-want-to-miss/
Taking bets on whether or not this is the balloon for the 'jump infantry': https://www.warhammer-community.com/2016/11/16/the-rumour-engine/
Reddit rumors developed a little further - the image is a zeppelin with the tail on the right side of the image. The duardin on foot look like 'steam punk trench fighters'.
Adeptus Titanicus is technically not 40K and it is the only system mentioned. AT has been made public for a while now so it's easier for them to call it out without spoiling something.
I'm pretty sure we've seen most everything in March's issue already and we won't see an April leak for quite some time yet.
You could have someone run both a player and GM, but they're going to have inside knowledge so someone else would have to determine their actions. I wouldn't recommend it.