No dlc should be released during the early access period, to me it seems they are just starting early testing/development for future dlc ideas with idle team members so nothing bad in there.
If they keep improving the game and make it a good complete experience for the real release i'll be optimistic about their dlcs in the future and buy if it's something interesting to me.
If they "abandon" the game before the major problems are fixed and call it released or starting to sell dlcs during the EA phase they'll never get another coin from me.
The elephant thing really seems like early work of something, i'll give them the benefit of the doubt no problem until proven otherwise.