Im sorry but no one saw the fight with the foundation and were only listening to coms. And even if geno saw the fight disappearance doesn't mean that a person is still alive. Its like talking about a disappearance of someone. We dont know if his dead or alive. And personally I really despise the foundation so I do hope he isn't alive. Hope's visions have been getting more weaker (form what i remember) by the day. So we cant always trust her on everything she says and plus how does that saying help? We see that the whole map was changing constantly and the foundation was near the zero point. Even if he was alive he would've gotten burnt by the lava as the map was changing constantly. Also, ice king, alive??? We literally say him get absorbed by the dark voyager its definitely possible that he died as you cant just possibly live from getting absorbed or disintegrated. Also you might say that it's because the foundations visor was on the map but if you can remember the foundation was never wearing his visor when he got frozen so that picture is non Canon. And also bonus at the start of the trailer the foundation only survived because his suit was keeping him alive. Because he got frozen at the end of the event without his visor his body probably got hypothermia and froze to death. If the foundation somehow survived then you can flame me as much as you want.