Pioneer 10 should reach Aldebaran in 2 million years, so we should alert
Joe Haldeman (The Forever War, about a centuries-long war with the
Taurans).

Pioneer 11 should reach the vicinity of the constellation Aquilla in about
4 million years. Aquilla's brightest star is Altair. It's alleged fourth planet
was home to the Krell from Forbidden Planet. I wonder what will happen
if Pioneer 11's aged computer gets a brain boost? P'neer, anyone?

Does anyone know where New Horizons is currently headed in terms of
other star systems? Just want to know where Clyde Tombaugh is
destined to end up.

Personally I am quite happy that the first human being to leave the Sol
system for the wider galaxy in at least some sense is Clyde.