Ennis was injured after his foot was caught under the weight of teammate Frank Pritchard and sat out the second-half with a bag of ice taped to his foot.
Ennis and coach Des Hasler did their best to downplay the situation at the post-match press conference.
Hasler quickly took charge when his skipper was questioned about the severity of the injury, interjecting to say: "I can answer that. Michael's fine. We pulled him off more as a precaution and he'll do everything in his power for him to take his place next Sunday."
Ennis will be desperate to take the field in the 2014 decider, in what will be his final match after six seasons at the Bulldogs, before he heads to Cronulla on a two-year deal. He was previously robbed of a premiership win when a knee injury ruled him out of Brisbane's 2006 title success.
Hasler will have other concerns this week, with halfback Trent Hodkinson struggling through the match with an ongoing knee injury which prevented him from taking the goal kicking duties and limited him to just one run in the 80 minutes.
The wily Bulldogs mentor emphasised the fact that the Rabbitohs are under tremendous pressure to end their premiership drought.
"Forty-three years without a grand final. I've got it down pat already, mate. It's 'Glory, glory to South Sydney'."
