u/ishipfitzsimmons

On the right of the minor partition, the very first name is Agent D. Sousa.

Daniel Sousa first appeared in Agent Carter Season 1 (2015), and he was also in Season 2, with a variant of him being in Agents Of S.H.I.E.L.D. Season 7.

The thing is, in Agents Of S.H.I.E.L.D. Season 1 Episode 12 (2014), on the Wall of Valour in the S.H.I.E.L.D. Academy, is his name, on the same board as Abraham Erskine's and Bucky Barnes (Really cool fact: Skye notes that Bucky Barnes' name on the Wall, and this is about two months ahead of the release of The Winter Soldier, and AoS' really big tie in with that movie).

Before Sousa's first ever appearance, it was confirmed that he would die.

Source of the image

It kinda makes sense. We got the Cloak & Dagger reference in Wonder Man, and if they're saving Josh Gad from where he is in Door Man in the Dark Dimension/Darkforce, it makes sense for Cloak and Dagger, who've been in the Dark Dimension before, to be able to save Josh Gad.

Avengers Mountain is an Avengers base in the comics where they use the corpse of a Celestial as their base. The MCU's Celestial Island is pretty similar, and it is partly connected to Sam, so since the New Avengers are using Avengers Tower, the Avengers could use Avengers Mountain.