No, I don't think we are related, but our ancestors attended the same church.
From the records I have:
John McCormick, son of Alex McCormick, married Martha Jane Whitten on 27 Dec 1867.
They were from Dervenagh, and had George on 7 Apr 1875, Jane Eliza on 17 Jan 1869, John Alexander on 11 Dec 1870, Margaret on 30 Jul 1877, Mary Isabella on 14 Feb 1884, Samuel James on 27 Jul 1879, and Thomas on 19 Dec 1872.
John McCormick, son of John McCormick, married Anna L Tweedie on 5 Sep? 1902
John A McCormick, son of John McCormick, married Minnie C Robb on 25 Sep 1907
Jane E McCormick, daughter of John McCormick, married Abram Hawthorne on 16 May 1894.
Samuel McCormick and Jane Irvine from Devernagh had Agnes on 10 Mar 1869, Harriett on 9 Apr 1880, James on 8 Apr 1875, Jane on 24 Sep 1866, Mary Anne on 25 Mar 1873, Samuel on 21 Mar 1871, and William George on 22 Mar 1878.
A.L. McCormick, 42, Devernagh, buried 4 Oct 1906
Agnes McCormick, 72, Devernagh, buried 2 Feb 1897
Edmund McCormick 6 mths, Devernagh, buried 5 Apr 1912
George McCormick, 28, Devernagh, buried 26 Jun? 1903
John McCormick, 84, Devernagh, buried 2 Sep 1915
Martha McCormick, 74, Devernagh, buried 19 Nov 1916
William McCormick, 73, Devernagh, buried 7 Apr 1874
I also highly recommend Roots Ireland, as their marriage records from this part of Nthn Ireland give a lot of info.