Since I learned practically nothing new from viewing The Secrets of Dumbledore, the Wizarding World’s third installment of the Fantastic Beasts film series, here’s what I hypothesize:

Trails of evidence –

• The Elder Wand (theory): “The wizard who controls the Elder Wand controls Fate.”
  • Between 1932 (Secrets of Dumbledore) and 1938, Albus’ phoenix (Fawkes) gives two tailfeathers to Ollivander the wandmaker. 
  • In 1938, Albus Dumbledore meets Tom Riddle at an orphanage and tells him he’s a wizard, then invites him to Hogwarts School of Witchcraft and Wizardry.
    • Tom Riddle is chosen by a wand in Ollivander’s shop with a phoenix-feather core (Fawkes).
    • From 1938 to 1945, Riddle attends Hogwarts; Grindelwald collects him at some point and tells him lies about Dumbledore; Riddle turns spy inside of Hogwarts, learning Dark Arts, Legilimency, Unforgivable Curses, and great secrets hidden inside Hogwarts Castle from Grindelwald. 
      
  • Dumbledore defeats Grindelwald in 1945 and wins the Elder Wand; he wields the Hallow from that point through the time of his death in 1997 (>50 years).
    • Albus is cursed when he takes ownership of the Elder Wand from Grindelwald.
    • Tom Riddle emerges as ‘Lord Voldemort’ amongst his growing followers, many of whom fall into his circle in grief over Grindelwald’s defeat and seeking someone to lead – Voldemort is Grindelwald’s natural successor.
      • *Voldemort never knew about the Deathly Hallows; he wanted the Elder Wand because he knew the ‘Death Stick’ belonged to his former master, and he couldn’t stand Dumbledore claiming it as his own.
        
  • For the second time, Albus finds himself unable to strike against a powerful foe; because Voldemort’s wand contains Fawkes’ tailfeather, Albus is unable to move against him.
    • From 1945 to 1981, Voldemort builds his army of Death Eaters, makes eight horcruxes: the diary, the ring, the locket, the cup, the lost diadem, Nagini, and quite unintentionally and unrealized, HarryPotter. H
    • Dumbledore continues his quest for the Deathly Hallows in absolute secrecy; he discovers the Invisibility Cloak between 1971 and 1978, while James Potter was attending Hogwarts; he comes to possess the Cloak in 1981 after James and Lily Potter were killed.
    • In 1991, Harry Potter learns he is a wizard and visits Ollivander’s wand shop, where he is chosen by the wand containing Fawkes’ second tailfeather.
      • The wand recognizes Tom Riddle’s soul inside of Harry and chooses him again, tying Harry’s destiny to Dumbledore’s directly.
      • Albus returns the Invisibility Cloak to Harry in 1991, deeming him pure and brave enough to become Master of Death one day.
    • Albus’ search for the third Deathly Hallow (the Resurrection Stone) continues until he uncovers it in the summer of 1996 at the Gaunt house; Dumbledore destroys the horcrux inside the Stone but is left cursed, yet he succeeds in returning the Stone to its former, unpossessed state; Albus then hides the Stone inside the first Golden Snitch Harry ever caught for safekeeping.
      
  • Albus is disarmed by Draco Malfoy and killed by Severus Snape on the Hogwarts Astronomy Tower in 1997.
    • Voldemort steals the Elder Wand from Dumbledore’s grave but is never its true master.
      
  • In 1998 (>50 years after Dumbledore defeated Grindelwald), Harry Potter becomes Master of Death receives Albus Dumbledore’s Legacy.

@bykaileyann