If you just pre-ordered it probably not. Pre-ordering is basically a very long line, and splatoon 2 has been up for pre order for a long time. Me personally I pre-ordered Splatoon 2 back on January 13th lol.
It is always first come first serve so those of us who preordered back in January have nothing to worry about. You however having just now pre-ordered are near the end of a probably very long line.