The seating chart for the TNA Impact Wrestling World Tour live event on September 17th, 2015 at the Kansas Expocentre in Topeka, KS reveals a ramp leading up to a six-sided ring instead of the four-sided ring.

This could be an indication that the six-sided ring may be making a return to TNA. You can check out the chart in the photo posted below, via Ticketmaster.com: