Why not? If a company like beam brings such plans in that city, you shall get such plans from BSNL.
Even BSNL just did not give ADSL plans just like that.
- First they made quite relative to beam's and even after they kept on loosing customers.
- Right now they a have plan which is better than beam's. But still i don't think a Beam customer would switch back to BSNL unless and until he's having serious downtime with beam.