Helenius was due to challenge Erkan Teper for the blue belt until the German suffered an injury in training and Canadian-based compatriot Rill, 28, was quickly drafted in earlier this month.
The EBU have moved to strip Teper of the title the undefeated puncher picked up with an impressive second round knockout of David Price over the summer, although the 33 year-old has since been stipulated to face the winner.
That means rejuvenated mandatory challenger Dereck Chisora is forced to wait until the completion of both contests before a purse bid can eventually be set for an expected shot at his old championship in 2016. ‘Del Boy’ made his debut under new promoters Sauerland with a fifth round triumph over Peter Erdos at the weekend and is set to be kept busy after severing his ties with old handler Frank Warren earlier this year.
Chisora could now tread water facing similar opposition to Erdos until his EBU chance arrives, or bypass the belt altogether in favour of domestic clashes against the likes of Anthony Joshua and David Price.
Once Helenius v Rill is out of the way and Teper is back to full fitness, Chisora will be able to gauge where he stands and how long the wait could be until his chance finally comes back around.
The delay also hits this Saturday’s clash between Joshua and Dillian Whyte as the victor will be out of the EBU reckoning until at least the back end of next year.