Bluegartr said that there has been multiple hints that FFXIV devs and Yoshi-P were interested in bringing more cameo from pre-FF14 series to give references and extra items like Lightning Returns.Â
But as of right now, I'd say that Hydaelyn's blessing would be more similar to Lifestream (Aerith's blessing/Great Gospel) and it can only be attained by Warrior of Lights. As for further details towards Lifestream and Mako Energy, there is none right now - but I am sure Cereleum is looked similar to Mako Energy. Garleans showed great interest in using cereleums and also they seem to use magiteks running with cereleum (I could be wrong but I am pretty sure airships are used by cereleum reactors)
But as of right now, I'd say that Hydaelyn's blessing would be more similar to Lifestream (Aerith's blessing/Great Gospel) and it can only be attained by Warrior of Lights. As for further details towards Lifestream and Mako Energy, there is none right now - but I am sure Cereleum is looked similar to Mako Energy. Garleans showed great interest in using cereleums and also they seem to use magiteks running with cereleum (I could be wrong but I am pretty sure airships are used by cereleum reactors)