Krsna's primary wife, Srimati Rukmini is a direct avatara of Mahalakshmi. The other 16107 wives are amsas of Mahalakshmi.
In the Bhagavatam, 10th canto, 1st Chapter, Brahma says to the gods:
Vasudeva Grhe Sakshat Bhagavan Purushah Parah
Janishyate tat Priyartham Sambhavantu Sura-Striyah
"The Supreme Personality of Godhead, Śrī Kṛṣṇa, who has full potency, will personally appear as the son of Vasudeva. Therefore all the wives of the demigods should also appear in order to satisfy Him." (Bhagavatam 10.1.23)
Thus, the wives of the devas also took part incarnations as Krsna's wives.
Furthermore, in the Garga Samhita (though it is accepted only by Gaudiya Vaishnavas), Lord Krsna instructs the devas:
Shrih sakshad rukmini bhaishmi shiva jambavati tatha
satya ca tulasi bhumau satyabhama vasundhara
dakshina lakshmana caiva kalindi viraja tatha
bhadra hrir mitravinda ca jahnavi papa-nashini
"The goddess of fortune will take birth as Bhishmaka's daughter Rukmini. Lord Shiva's consort (Parvati) will take birth as Jambavati. Tulasi will take birth as Satya and Vasundhara (Bhudevi) as Satyabhama. Dakshina (The consort of Yajnapurusha) will become Lakshmana, Viraja (the sacred river of Vaikuntha) will become Kalindi, Hri (The consort of Dharma) will become Bhadra, and Jahnavi (Ganga), who destroys sins, will become Mitravinda." (Garga Samhita 1.3.37-38)
Then later on, Krsna says,
ye ye 'vatara me purvam tesham rajnyo ramamshakah
bhavishya raja-rajnishu sahasrani ca shodasha
"Whenever in the past I incarnated in the world, the goddess of fortune would also incarnate as My queen. This time she will incarnate as My sixteen-thousand queens." (Garga Samhita, 1.4.32)
Thus, each wife of Krsna was a goddess with Lakshmi Devi's amsa residing within her.
Also, this implies that only for Krsna avatar, the whole Trimurti-Tridevi and other deva's wives concept was scrapped, so that they could all become Krsna's wives.