Single Report from two different universe

HI Guru ,

I have a requirement

I have to create a single report with two Universes

1) Universe A Contains Data from jan 2015 to Dc 2015

2)Universe B Contains Data from jan 2016 to Till now

I want to see Both universe(A+ B) data in Single report .

I guess i can achieve the same by using merged dimension

but have few questions do i will be getting Duplicates issue and what changes i have to do in the reports.

Thanks in advance

Sinha