sonic heros continues a good story, i just wished that the gameplay and graphics cought up to it.
gameplay-heros introduces a team formula into the mix, so you've got 3 forms, speed, fly, and power. speed is not as fast as in SA2B and the controlles are sloppeyer (< is that a word?), but you still get the classic moves you'd expet, like light dash and homeing attack. fly just slows d o w n t h e ac t i o n. power is for those times where you need extra musle.
graphics- fair, to say the least. it still looks like a dreamcast game. Hey SEGA, the dreamcadt is dead.
sound- upholds the 3D sonic tradition of being great.
overall- rent it, don't buy it.