Here's everything you need to know before Thursday's opening bell`:
Ousted Papa John's chairman John Schnatter held talks to merge the pizza company with Wendy's .
IBM rose premarket after an earnings beat and rising revenue.
UnitedHealth is reportedly eyeing Tenet's Conifer, in a deal that could be valued at $2 billion.
Investors will digest earnings from Microsoft, Danaher and more.
U.S. stock futures pointed lower on further trade concerns.