First of all Transformers will not release on Eid... Cz it won’t get screens in North and Central India due to Tubelight and in South due to Spyder. 2ndly, Sunny Deol's BS can't afford to clash with Tubelight... It's just a publicity stunt.
In West bengal, big hindi movies do much more business than bengali movies. It's not like South India that people are crazy about regional films. So, Tubelight will be hardly affected.
Yes Spyder will affect Tubelight's business to some extent. But we shouldn't forget that Bajrangi Bhaijaan did excellent business in South in spite of Baahubali wave. So, definitely Tubelight will do blockbustrous business if content finds acceptence.