'Bachelor' Chris Soules -- Theme Park Appearance Turned Into Cattle Call

'Bachelor' star Chris Soules is suddenly single, and a lot more marketable ... at least to one venue, which is fully taking advantage of his breakup with Whitney Bischoff.

As all of Bachnation knows ... Chris and Whitney ended their engagement Thursday -- and the folks at iPlay America (an indoor theme park in NJ) immediately reacted by relabeling him the "The Ultimate Bachelor" on all its promos.

Soules is the main attraction June 13 at iPlay, and previously the park was simply billing him as a 'Bachelor' star and "Dancing With the Stars" contestant.