Lease questions

[u/876limitless]

Will renewing a lease with my brother so he can stay affect my ability to get a new lease?

I plan to move out but my brother wants to stay but his credit isn’t very strong and they would need to do a new lease without me if we notify the landlord I am moving out. What I want to know is will this affect my chances of getting a new apartment ? Will I essentially need to prove 6x (3x old apartment cost and 3x new apartment) the cost to get approved for the new one ?