It will be interesting to see who will make the Govt if NDA reach to 200-220 (my perdiction is 190, +/- 20 seats). It looks certain that UPA will lose seats and should be around 140 (+/-20). That leaves third front with close to 170-180. I think congress will try to keep BJP out and will be ready to support third front from outside. Then Mulayam will have a real chance.
Another alternate could be BJP declare Advani as PM and gets in more allies like Mulayam and form a govt with them (that way Mulayam would be able to clear the cases against him as well). However this will depend on whether they declare Modi as PM before the elections or not (which probably they will).
Not a very bright situation for the country.