Probably...but they have HUGE franchise on the Warhammer 40K (either RTS or Action) and they are ****in great... plus for RTS THQ is the **** man...blizzard suck compared to them... Compagny of heroes is prolly better then anything SC related( I know SC is more popular....but it's a more arcadish RTS...and let's be frank...SCII was complete ****...just SC1 with updated graphicx, nothing new under the sun !)
The reason they dropped it was because they failed to break even. You're completely right, the first game was something most hadnt experienced before, but its not like FIFA where people will buy the same game every year. Games like Fight Night are at least re-invented somewhat in each iteration... I would assume Smackdown is still a bigger moneymaker for them.