Re: Can soul ever return to samsara after getting moksha.
In this regards I quote what Shree Krishna says in Bhagvat Gita
This unmanifest state is called the imperishable or Brahman. This is said to be the ultimate goal. Those who reach My Supreme abode do not return (or take rebirth). (8.21)
The goal (of nirvana) should be sought reaching which one does not come back; thus thinking: In that very primal spirit I take refuge from which this primal manifestation comes forth. (15.04)
The sun does not illumine there, nor the moon, nor the fire. That is My supreme abode. Having reached there they do not come back. (15.06)
Of course great personalities like Narad, Hanuman come and go as they please.
But if we gain Heaven by good karma
The knowers of the three Vedas and the drinkers of the juice of Soma (or devotion), whose sins are cleansed, worship Me by Yajna for gaining heaven. As a result of their good Karma they go to heaven and enjoy celestial sense pleasures. (9.20)
Having enjoyed the wide world of heavenly sense pleasures they return to the mortal world upon exhaustion of their good Karma (or Punya). Thus following the injunctions of three Vedas, the fruitive workers take repeated birth and death. (See also 8.25) (9.21)
Jai Shree Krishna
Rig Veda list only 33 devas, they are all propitiated, worthy off our worship, all other names of gods are derivative from this 33 originals,
Bhagvat Gita; Shree Krishna says Chapter 3.11 devan bhavayatanena te deva bhavayantu vah parasparam bhavayantah sreyah param avapsyatha Chapter 17.4 yajante sattvika devan yaksa-raksamsi rajasah pretan bhuta-ganams canye yajante tamasa janah
The world disappears in him. He is the peaceful, the good, the one without a second.