Fleiss didn't elaborate further or give any additional details on whether the announcement has to do with The Bachelor's next 22nd season specifically or one of the other shows in the franchise, such as Bachelor in Paradise or The Bachelorette.
In the past several weeks, Fleiss has been sharing updates of Rachel Lindsay's season of The Bachelorette, which is currently filming.
Fleiss has said "you're gonna love" Lindsay's season, she's "flying towards love," and "of course [the suitors] are fighting over" her already on Season 13.
Fleiss also captioned one photo of Lindsay wearing a sparkly evening gown and sitting in a limo, "Could @TheRachLindsay possibly be any more beautiful? The answer is NO!!! #TheBachelorette."
"It's no secret I'm super skeptical, but I will honestly say that I am so hopeful. I have an amazing group of men and I see a lot of potential," the 31-year-old Dallas, TX, attorney said on the talk show. "I'm really, really excited to see how this goes, and I feel good."
Earlier this month, Fleiss posted numerous tweets regarding President Donald Trump potentially stopping by Bachelor in Paradise.
"Working out details to have @realDonaldTrump make an appearance on this summer's #BachelorInParadise! #historicness," Fleiss tweeted. "If @realDonaldTrump approves the #BachelorInParadise deal, I will donate my entire BIP producer's salary to his favorite charity."
Fleiss later clarified, "To be clear, @realDonaldTrump will not be coming to #BachelorInParadise to hook-up. He'd be co-hosting with @chrisbharrison."
As for the cast of Bachelor in Paradise's fourth season, Fleiss revealed he'll be making the official announcement right on Twitter.
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"Just wait til you see this season's cast for #BachelorInParadise!!!" he tweeted with excitement.