Just to add on to my earlier post, since Alexander of Lyncestis should be in his sixties during the Balkan campaign, and as far as I know had no sons, the Argead succession is still in a rough spot unless Alexander IV has any sons before he dies, and thus is still probably screwed and going to come down to Arrhidaeus. I'd forgotten that he'd been married to a daughter of Antipater (hence why it took so long for him to be executed), so Antipater would be the closest non-Argead to the throne, and should Alexander IV die with male issue Antipater would most likely be regent for the boy - although even if he doesn't he and/or Parmenion would take that role for Arrhidaeus anyways. As Velasco says there's a good chance Alexander of Lyncestis marries one of Alexander's sisters (although probably not Cleopatra since she was still married), and maybe one of Parmenion's daughters too, if he had any (can't recall right now). Most likely he marries Cynane or Thessalonica. Maybe Philotas, Parmenion's son, is wedded to to the other sister if Parmenion has no other daughters to marry to give him an alliance with the royal family and more equal footing with Antipater.