Start selling Prestige Classes on the marketplace and release new ones quarterly.
To prepare for this, start an open discussion about what prestige classes we'd most like to see and develop the four most wanted.
Sell them for 595TP each.
Also, release the Warlock class and sell it (with two or three built in prestige classes) for 1295TP. This could be the new paradigm for revenue, and people will buy it.
Re-Tool Current Content:
Make Epic Vale of Twilight (and epic-ify the base quests and raid which are already there.) Add five or six new adventures to that pack with a new raid and sell that pack expansion.
Completely retool the Twilight Forge content. Create a much more vast underground tunnel complex which is easier to navigate and add 2-3 more adventures. Retool the raid. Make epic versions of all of it.
Implement sagas for all levels, across Eberron and Toril.
General Items: Create "cool" effects. Instead of damage, make items proc damage mitigating factors or summon monsters, make 'heirloom' items that can level with the player
Weapons: Create a two handed martial piercing weapon (trident anyone?)
Spells: Make mass versions of resist elements and freedom of movement, REMOVE all the mass ability score spells (because they are worthless.)