The LEGO Ideas Blog has confirmed that while both 21109 Exo-Suit and 21110 Research Institute are sold out at the moment, they will be getting more in. If you are wondering why they are not taking more backorders, the reason is most likely because the next batch of sets being produced have all been ordered by the “backorders” already. So fear not! The two new LEGO Ideas sets will be available again in the future once they have caught up with the demand.
On August 1st, LEGO Ideas launched two sets: #21109 Exo Suit and #21110 Research Institute. Currently, both sets have sold through their initial stock and are back-ordered. This means that more sets are on the way, so we hope you will be able to secure these and other special sets from LEGO Ideas.
Thanks to ncbarrett for the heads up!