The movie features a wide array of callbacks to prior JTCU movies. These include; a brief visit to Minecraft (this also happened in "The First Movie"), a time-travel back to Reality-EJEA in 4040 (where "Tries 2: Save the World Again" opened), and a mention of Harry and co. being stuck in the 1600s (which occurred in "Otamatone 2: Rise of the Kraken").
Daniel Chapman returns in an end-credits scene, setting up yet another confrontation between him and Jayden Tries.
Jayden Tries and Alexia Doesn't Try appear to have rekindled their relationship by the end of this movie, since she sued him at the end of "Better Call Tries".