Reports before the episode aired had suggested that the hit-and-run storyline would be resolved with a real killer coming out of "left field".
However, the twist was eventually changed and Annie (Shenae Grimes) confessed to the incident.
Wilds, who plays Dixon, has now told E! Online that the alterations will have a positive impact on the third season.
"I hope that nobody was upset," he said. "I just think it left some more for the next season so you guys can tune in and watch... Some of you guys were upset, but you'll get to see what happens next season. You know, we gotta keep the fans thirsty."
Wilds also promised that the departure of Rob Estes, who played Harry, will have repercussions next season.
"You'll see another part of American culture," he said. "It's the plight of the single mum [Debbie]. You get to see what she goes through and how she copes with dealing with two kids and still trying to find a job and keep a house et cetera, et cetera. It'll be a very different dynamic, but it's still very, very true to life."
He added: "It's gonna be a good senior year."
90210 will return for its third season on The CW later this year.