You may be getting caught up in the Battle of Endor syndrome, in which there are hundreds of capital ships, cruisers, fighters, bombers, civilian craft, everything just shooting at each other. This sort of mission usually sucks very badly as the player is sidelined, there are massive slowdowns, crashes, stuff like that. And there are rarely more than 5 capital ships engaged in a battle at a time in the main FS2 campaign.
Inferno is mostly remembered for multiple uber capital ships, such as the Gigas and Gargant, which are more than 20km long! The Gargant is 38km long!
However, the special release of Inferno SCP, as you probably know now, is quite different from the original release, Release 1, which involved slightly bad mission design. In INFSCP you can expect more elaborate missions like the last few of Release 1.
However, Woomeister is quite reluctant to make a large-scale battle, as seen in the second-to last mission of Inferno R1, Nemesis, which involved huge fleets in battle with the player providing intercept. Although this mission did not suffer from player-sidelining, the more major problem of slowdowns and crashes persists.
Sid or Rampage may have some cool large-scale battles in the works, but as far as a super-obsessive fan boy knows, there aren't any in production at this time.