It's unlikely Ajay Devgn will release this movie on Eid but he can still opt for Independence Day which will suit its genre and content. This type of movie isn't suited for Eid because its not an action movie or proper commercial entertainer. Usually masala action films and festival release often attract masses on these occasions.
There's a another scenerio but that's not a gurantee.
If Salman has one release and opts for X Mas (Tiger 3) then Ajay will clash with another actor.
As far as MayDay goes, I'm looking forward to it but at same time I feel reluctant. Ajay's directonal movies have not worked previously at the Box Office. Worst part is that he doesn't know how promote his movies and that's what bothers me as a fan. However, its possible that he may strike lucky with this movie with a potential Hit. This is all depends on the audiences response and word of mouth.