Is anything in andromeda about shepherd.

Garson didn't die in cryosleep. She was murdered. And she believed the people who helped her fund the Initiative were after her.
She admits she didn't have the money, and this mysterious benefactor was spooked and wanted to put 100.000 people in the Ai and leave the Milky Way.
She left a private message to be decoded containing everything she and Alec knew.

Alec has a conversation with Castin Vakarian (the father of Garrus, and also voiced by Brandon Keener, what a pleasant surprise!) and they talk about how Garrus and Shepard are right about the Reapers, that the Council officially denies their existence, but are starting to believe them. Alec then says if this all is true, the Initiative must be accelerated to escape the impeding doom.

It still doesn't confirm the Benefactor is Cerberus, but it's mentioned they suspected the Reapers for years, Shepard just made it real. Similar to what the Illusive Man implied.

Ellen gets into cryosleep in the Hyperion using a different name, but Alec doesn't tell his kids about it. Mother is still alive, and those are the final words Alec says to Ryder before dying. She's alive, but they can't wake her up until they find a cure for her disease.

The people that know about the Reaper War in the Milky Way seems to believe that humanity has ended and the people in the Arks and Nexus are all that's left of their species.