Okay lets not get into a game of prediction. A movie can go either way. I personally respect Mani Ratnam's work and expect him to come with the goods.
Plus I really want Ravaan to be really good, because the movies off late
I mean I cannot seem to remember any good movie that strikes out this year
I agree. And Mani started to find his feet with the Bollywood industry with his last film 'Guru' which was a hit film (I have seen box office reports from reliable sites to prove this). And the promos of 'Raavan' released so far have packed quite a punch (esp. super BGM by Rahman).
SaiSrini added 1 Minutes and 52 Seconds later...
Raavan is gonna be a big flop in Hindi.
Can't say about Tamil version.
I would say Hindi will fare much better than Tamil (both versions will be hits). In Tamil, it will run only in cities. In the rural areas, there will be non-acceptance (Tamil people in rural areas dont accept different kind of films easily; they want a big hero to bash 100's of goons, sing duet songs with heroines, do some comedy and save people).