Originally Posted by Thaurin 
Also, it is bullshit that there are "offline" and "online" endings. You can have all endings by playing just offline (it will just be harder).
No.
Thereīs simply not enough war assets in the game, imported saves or not, to provide for one particular "destroy" ending variation.
And itīs a pretty significant one, because itīs the only ending where
Having the green bar full grants access to all three main choices, but that one particular ending requires at least 4000 EMS, which means youīd need to gather 8000 war assets (you canīt raise readiness via single player in any way) and thatīs impossible since optimal playthrough (through the whole series and with all DLCs) only nets around 7500.