i wasn't under the impression blizzard needs more money. and i don't think you understand business law as much as you make it out to be. i'm no expert, but if you can provide some examples that'd be great because clearly you know more than me.
"if they love dota that much they'll get over it" - have you heard of DRM? DRM is bad, people don't like DRM, people pass up games with DRM just because DRM. What does that mean - upset customers don't use products. upset dota fans won't just accept blizzard shutting down a game for no good reason. gamers, for whatever reason, feel entitled to everything, and so, if blizzard sued, they'd be angry, cause as stated, no good can come fom it(they wouldnt get millions of dollars from the suit, the negative publicity would probably end up costing them more).
Should blizzard sue tower defnse games? im pretty sure I played a game mode in starcraft where i set up whatever the zerg sentry/turrent, shooter things were called, and killed creeps.
S2 already has the lore in a sense(savage 2 takes place in newerth, heroes of newerth, don't need to go further). they aren't taking blizzard's engine. they are not taking their art. they asked the creator of DOTA to make this, and was approved, EVEN though the creator of dota is working on League of legends, which is the same thing
so first off, if blizzard can sue this, thousand of other cases can be made for others games. second, if they waited this long into development of the game, that would look extremely bad and douchbag like. if they were to sue LoL and HoN that would be unbelievable, especially after how much the creator of DOTA did for wc3.
blizzard employees are working on LoL, they left blizzard, and now working on that. blizzard probably knows the game is out there( i can't guarentee that, i know no one at blizzard), they could of stopped it a while ago
if blizzard can sue in this case, thousand of other cases possible(unless i'm missing the HoN team stealing art or something)
don't need money
if they sue now, they look like asses, they probably lose more money from customers