One Piece Episode 486

[DarthEnderX]

He probably just planned to kill Whitebeard later.

Or considering the situation, maybe his original plan was to just dig up Whitebeard's body after he died of natural causes.

[Marik]

[yibis] One Piece 486 - 720p: Torrent | DDL
[yibis] One Piece 486 - 400p: Torrent | DDL

[FireEmblem]

Don't forget though, it really wasn't part of Blackbeard's plan to kill Whitebeard.
In fact, if Ace hadn't shown up, Blackbeard would've gone after Luffy instead, and the war likely would not have happened in the first place.

Had he killed Luffy, wouldn't Ace have fought with him anyway? (for even more reasons now) I wonder how different things would have been if BB hadn't met Luffy at all. I wonder if Ace would have considered running away (if he could) if he didn't have to worry about BB going to kill Luffy.

Though I think you're right about killing Whitebeard not being a part of his plan. Not yet anyway.

[Assertn]

Blackbeard didn't know that Luffy was related to Ace when he set out to capture him, though.

[FireEmblem]

Yeah I know, but I mean Ace would have caught up to Blackbeard anyway, right? After he had killed Luffy.