A display panel, a display device, and a fabrication method for the display panel are provided. The display panel comprises an array substrate comprising a display region, wherein the display region comprises a plurality of data lines, a plurality of scanning lines, and a plurality of first pixel regions defined by the plurality of data lines and the plurality of scanning lines intersecting the plurality of data lines. At least two data lines have different lengths, at least one second pixel region is disposed between a first pixel region corresponding to a data line and an edge of the display region corresponding to the data line. The at least one second pixel region at least comprises a first metal line segment and a second metal line segment arranged in parallel, and the first metal line segment is disposed on an extension line of the data line.