Ranbir and Bhavisher twin Brothers

They could be twins... if that is so I think Ranbir won't support Bhavishya

May be they are twins and separated in childhood but for sure Ranbir won't help support Bhavishya.
One thing to note is they have diff parents.

They can't be twin. Where was he when all these bad things happened with Saraswati and Satyakam? Ranbir is Bhavishya.

even i think that ranbir is not bhavishya but his twin...coz they cant let 2 sis marry the same abuser and go through the pain... maybe they did get sepearted at birth and he found out after he was admitted to mental asylum so they made a plan....or could be that only bhavishya knows and he will switch with him soon by kidnapping ranbir...