A Mass Effect 2-3 Roleplay Idea

This is my idea. it kind of bridges mass effect 2 and 3. here are my ideas

-This will have multiple settings and will have some parts on the normandy
-Will need someone to be Joker(preferably someone who is great at being a smartass) and an EDI also various crewmembers that speak like ken gabby and kelly but they can be removed as necessary
-Shepard will be included I will use him (my shepard) since there are millions of different ones.
-Shepard's crew most likely will be useable (if we go with my story there will be no ashley and also try to fit the roles of the character)
-The OCs will be divided into the normal classes plus one more that i designed
-OCs can be any race that has appeared as a squad member (plus batarians)
-Race rules apply (all asari have some form of biotics and there can only be 1 ardat-yakshi)
-Biotics probably will have to be careful to not be overpowered
-The merc groups are not currently going to be involved but an OC can be a former member
-Also if I follow my story in this Tali is my romance option just throwing that out there

If there are any suggestions I'd love to hear them also since this roleplay is going to require a lot of people (or a few people who love to multi-task) please start telling me if you are interested.

-the general idea of this role play is that Shepard didnt make it in time to save the whole crew and is now looking to fill a sizeable hole and/or is trying to build an impressive army to combat the reapers seeing as cerberus is a bit on the untrustable side and the alliance and council are sitting on their hands(not hard to imagine where their thumbs are(Mass Effect 1 joke))