Helenius father give a tip that his next opponent might be a Ex-champion without big break!? The first come to my mind is Chagaev
He doesn't have much choice after his fight with Liakhovich, he needs to keep his momentum going. Personally, I'd like to see him fight Fury. Or Butterbean.
Chagaev is past it now but a prime Chag would beat Helenius, plus Chagaev recent loss wouldnt of done him a lot of good, id say if Chagaev would of fought Helenius instead of povetkin he would of done better against Helenius than Liakovich did but i think Chag would of lost a lot of confidence over that loss.
Yeah the Chagaev fight is a natural progression. Tough challenge for RH. But imo Chagev looked so slow against Povetkin that I think RH eventually gets to him. I'm not sure what other ex-champs are out there.
I really can't see too much positives in going against Chagaev. It will be a replicate of Liakhovitsh bout. Dimitrenko would probably be the most obvious fight at the moment, but since neither Dimitrenko, Fury or any other of the rising stars are too keen to face Robert, the options are quite limited at this stage. As a build up towards a Klitschko fight a Ko win over Chagaev probably is one of the few options available at the moment.