The former Swansea City striker will line up against the club he was adored at for the first time since his million pound move last summer to Ashton Gate.
“It will be strange,” Trundle told the Western Mail.
“It will be strange just because it’s going to mean playing against a club that means so much to me.
“And I can say this 100 per cent, there’s no way I’d ever celebrate if I scored.
“It would be walk back to the halfway line and start again.
“As a professional footballer, you have to do a job, but that doesn’t stop you having feelings.
“I love Swansea City as a club so there’s no way that I’d rub it into the fans that have meant so much to me.
“So I know sometimes you can say you are looking forward to the match – but at the moment I’m about 50-50.
“I was so pleased to see the lads do well last year and there’s no regrets over leaving because of that,” said Trundle.
“Football’s not about ifs or buts – when chances come up that are too good to turn down, you don’t turn them down.
“But I never got a chance to say goodbye because the move happened in pre-season.
“So hopefully I will get a good reception because Swansea is a club I love and the fans meant a big part to me.
“It’s been tough,” said Trundle, who has seen Adebola, John, Nicky Maynard, Darren Byfield and John Akinde all added to Johnson’s forward line since his big-money arrival. “I’ve been in and out of the side this season.
“I’ve only started four games and played in different positions and it has been hard.
“It’s been difficult, but I hope I get the chance to start on Saturday.
“Swansea are doing really well, but I always knew that would be the case.
“They like to get the ball down and play football. That’s the way Roberto has got them playing and I knew they would do well this year.
“I still speak to a few of the lads. I was there for four years and had four great years, so I made a lot of friends, in and out of football
“I enjoyed my football there, I enjoyed my life there. So I would never, never rule out a chance to go back.”