The new accelerator complex Nuclotron-based Ion Collider fAcility (NICA) is under development and construction at JINR, Dubna now. This complex is assumed to operate using two injectors: the Alvarez type linac LU-20 as injector of light ions, polarized protons and deuterons and a new linac HILAc - injector of heavy ions beams. The modernization of Alvarez-type linac began in 2016 by commissioning of new RFQ foreinjector, and in 2017 the new buncher in front of linac has been installed. The first Nuclotron run with new buncher was performed in January 2018 with beams of Xe+, Ar+ and Kr+. The beam produced by KRION-6T ion source were successfully injected and accelerated in the Nuclotron ring during the last run #55. Main results of the last Nuclotron run and plans for future development of NICA injection complex are presented in this paper.