Horrible flag since it basically represents Russian imperialism.
The people of a region deciding (in an overwhelming majority vote, mind you) to leave Ukraine and join Russia is Russian imperialism? It must be some powerful force, to be able to garner 80+% of the vote in the regions that voted to leave Ukraine!
Even ignoring the legitimacy of said polls, You realize Novorossiya is a supposed idea that covers all of south east ukraine? Are you going to claim all of those areas support being invaded by the Novorossiyan forces?