Why not fight Wlad first? He's the one that got called out face to face 2 years ago and Wlad's the one that called out the WBA title holder and called him a bitch.

In my opinion Vitali already had his chance at a top rivalry, if I was Vitali I'd go after Valuev next, its a decent fight to be made and Solis too that's a good fight, but leave the WBA title holder to Wlad it makes for a much more heated rivalry and a more interesting fight.