A major new expansion for Twilight Imperium is coming soon from Fantasy Flight. It's called Prophecy of Kings and it will greatly increase your options in games. Starting out there's 7 new factions being brought in, each with their own agenda and strengths. To fit all those factions, the number of planets is also increasing by 40. With all of that, even those around the edge of the table will expand, since now you'll be able to play with up to 8 players at a time.
From the article:
The lost planet of Ixth, fabled paradise of a million dreamers, promised land of a thousand faiths, a legend as old as the Lazax, has been found. Unfortunately, the old tales of Ixth are nothing more than lies, and when an exploratory expedition ventures through a sealed wormhole in Creuss space, they discover a tomb-city outside the galaxy. This city is a prison, constructed for one purpose: to imprison the Mahact Gene-Sorcerers, tyrannical kings of the galaxy before the Lazax ever rose to power. And now that they have reawakened, no power can compel the Mahact to stop their burgeoning conquest.
Fantasy Flight Games is proud to announce Prophecy of Kings, a brand-new expansion for Twilight Imperium Fourth Edition!
This massive expansion is packed to bursting with new content that you can add to your games of Twilight Imperium. The galaxy has grown far larger, as seven never-before-seen factions enter the game, each boasting their own unique strengths and weaknesses, from the gene-altering powers of the Mahact, to the watchful guard of the Argent Flight, to the mysterious and ancient Empyrean. And new factions aren’t the only way the galaxy grows bigger! Forty new system and hyperlane tiles add new planets and obstacles to the map, and with two new colors of player components included in the Prophecy of Kings expansion, you can play Twilight Imperium with up to eight players.