Having just the tantalizing discoveries of the saga evidence, the Adam of Bremen account, the archaeological find at L'Anse aux Meadows, and the small but nonetheless intriguing archaeological evidence of Norse-Dorset trade (see https://www.historymuseum.ca/learn/research/resources-for-scholars/essays/dorset-norse-interactions-in-the-canadian-eastern-arctic/) we are left with great curiosity and more questions than answers.
What is the likelihood that continued investigation and the use of new historical and archaeological methods will uncover more facts concerning Norse contact with North America?
There is a possibility of learning more through DNA analysis of the relatively isolated and homogenous population of Iceland. See Ebenesersdóttir, S.S., Sigurðsson, Á., Sánchez-Quinto, F., Lalueza-Fox, C., Stefánsson, K. and Helgason, A. (2011), A new subclade of mtDNA haplogroup C1 found in icelanders: Evidence of pre-columbian contact?. Am. J. Phys. Anthropol., 144: 92-99. https://doi.org/10.1002/ajpa.21419.