Hope im not adding spoilers if i am to the old series look away now!
Right 1st i see we have got the tempest and a gorgeous ship she is by the look of her easily the size of Normandy 2. Yay
We then see its on the ground does that mean EVA's will be ship flown to then dropped and they brought back the Mako!!!!! yay
The look of the larger ships look like they have rebuilt the Mass Relays of a sort maybe not as good as she could of either been in a cryo like area or she has a big bed room for captain !! lots of place for snoo snoo but no fish tank in view ...
Looks like the normal races are there for the most part we might still hear from the "Information Broker" but that could be the only tie in as Liara was quite young when we meet her and im guessing this is many years in the future. All the other races if i remember are longer than human life spans but nothing like an Asari i could be corrected.
The bases are of a simular construction to what was on outposts in all three games.
Then the graphics are a massive overhaul yay! and looks like there are some reasonable particle physics at least round the Mako, Biotics still look cool

will i be brave enough not to pick a soldier class again
Some giant baddies as usual including that giant worm thing. easy to kill just annoying!
and i thinks they stole a brute from halo fed him steroids and then took his hammer!
Then they top it off by by doing a commando.
As you may of guessed im excited!