2021

Also known as the "Second Golden Age" of the franchise by older fans of the series (after the 2012 era) and the "Third Golden Age" by others (after the 2016 era), Rovio was listening to their player base and attempting to improve their fan interactions. Many of these new changes included:

Rovio Announcements:

 * Alexandre Pelletier-Normand stepped up as the new CEO for Rovio Entertainment on January 1st, 2021
 * Rovio will bring back some of the older Angry Birds to the app stores around mid 2022 (except Rio and Star Wars), as a result of the popular "Bring Back 2012" initiative.

July 2021

 * Angry Birds Reloaded released on July 16th 2021 (or 11:00 P.M EST on the 15th)

April 2021

 * Angry Birds Double Crossed was shown to the public on April 6th, 2021 through Instagram ADs and a Geeklab survey.
 * Angry Birds Launch it! was shown to the public on April 6th, 2021 through Facebook ADs and a Geeklab survey.

June 2021

 * Bad Piggies 2 was shown to the public on June 5th, 2021 through TikTok ADs and a Geeklab survey.

Sources:

 * https://www.rovio.com/articles/alexandre-pelletier-normand-appointed-as-the-new-ceo-of-rovio-entertainment-corporation/
 * https://twitter.com/angry_facts/status/1401285875930218519