Whispers in the wall:
In this new story-driven cinematic quest, you’ll be caught in the middle of a deadly battle between Albrecht Entrati, one of the Origin System’s most brilliant minds, and the unknowable Man in the Wall. The board is set and the pieces are moving. Can you put it all together in time, Tenno?
I guess we’re fighting Wally, indirectly maybe? Murmur confirmed to be his creations as well
Naturally, you won’t be fighting unarmed, either. Hold fast against the dangers littered throughout Albrecht Entrati’s secret laboratory with an all-new Secondary weapon class — the otherworldly Grimoire.
Grimoires confirmed to be secondary weapons, in case people were wondering
Warframe 1999:
Long before The Old War, the deeds of Albrecht Entrati have cast an ominous, lingering shadow over the Origin System. Who is he? What is his story? Learn more of his secrets in Warframe: 1999.
Time travel confirmed?
Wally has basically been a confirmed enemy force since at least zariman since he is referred to as the opposing force for one of the modes.
But yeah. Curious if it is more “sometimes we fight, sometimes we ally” like the rest of the factions or if this is the decade two big bad