Non-terrestrial networks (NTN) are complimentary to terrestrial network and expected to provide eMBB services to the areas where there are limitations. In recent years, this non-terrestrial industry has been evolving at an unprecedented speed. A couple of mega constellations have been initiated or planned in the coming years as the cost of launching rockets and rolling out satellites are hugely reduced, which make it possible to build mega (Low Earth Orbit) LEO/VLEO constellation. The emergence of low-cost mega LEO/VLEO constellations tends to be a game changer, since (i) their lower orbit altitude ensures a low latency close to that of a global cellular network and (ii) the scale of constellation provides much higher area capacity than a traditional satellite network. Both are crucial to providing eMBB services. The integration of NTN into terrestrial cellular networks is another important aspect in achieving truly global coverage, since it facilitates seamless roaming between cellular and non-terrestrial networks with a single device. The above-mentioned low latency, high capacity and seamless roaming will jointly contribute to a better user experience. However, a set of enablers are needed to realize the benefits of LEO/VLEO constellations. In this panel, we would like to invite experts from both industry and academia to shape the future of integrated mega constellation based network, deep dive the pain point of existing solutions and find out the potential research directions.