I fear that there is still no definitive plan for the prequels, 5 years after the release of Prometheus.
At some point FOX will plug the plug, and we'll be left with an uncompleted connection to the original series.
Prometheus followed by Alien: Covenant, Alien: Covenant 2 and Alien: Covenant 3 is more than enough.
5, 6 prequel films are just ridiculous.
Ridley and FOX need to come up with a complete plan of where the series is heading, and stick to the Alien: Covenant prequel trilogy that has been mentioned before. Anymore films after that would be overkill.