Anything could happen, but I think it depends on how committed DC is to either Bernard or Tim dating guys. While Tim/Steph has been around awhile and does have its fans, it's hardly a defining trait of either character (like how Lois Lane is the leading lady of Superman and Mary Jane will always be Spider-Man one true love no matter how much Marvel hates that and is trying to erase it). Heck, Bernard has been the only love interest we've seen for Tim in adaptations and Steph's only time as a major character in an adaptation had her enter an LGBTQ relationship with Harper Row (no comment on the irony of Harper being invented as a stand-in for Cassandra Cain). It could
also be tricky to have Tim date Steph and not fall into the trap of having a bi character who's basically written as straight, but that's another conversation.
Long story short, I don't think there's anything preventing it from coming back, but, if DC wanted to rebrand Bernard or someone else as Tim's one true love and recast Steph as the ex (like Black Cat or Lana Lang), I think Steph has evolved enough to stand alone without being Tim's love interest and the ship is not mainstream enough that they could write it out forever and make it stick. Time will tell, though.